Hello. I was having symptoms of pregnancy and my doctor told me to stop taking my birth control. So, I did and a few days later my period. Is there a possibility that I could be pregnant? Did I miscarry?

Also, I had a white head right beside the crease in between my vagina and inner thigh. I popped it pretty easily but it's still pretty big and produces blood and a clear liquid. What is it? What should I do?

Thank you